Multiwavelength evolution of GROJ1655-40

Details Multiwavelength evolution of GROJ1655-40 Multiwavelength evolution of GROJ1655-40

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005atel..486....1s&link_type=abstract

The Astronomer's Telegram, #486

Astronomy and Astrophysics

Astronomy

5

Optical, X-Ray, Black Holes, Transients

Scientific paper

ROTSE-III monitoring of GRO J1655-40 reveals that over the last 24 hours, the optical intensity of this source has declined significantly. For the last forty days, it has remained near an unfiltered magnitude of 14.2 (calibrated to the USNO A2.0 R-band catalog), but at MJD 53500.489 it dropped to 14.7±0.2, and since 53501.0, it has remained within 0.1 mags of 15.1. Meanwhile, the ASM quicktime analysis reveals that the 2-12 keV X-ray intensity has been rapidly flaring between levels of 2.0±0.1 to 4.4±0.1 Crab over the same time interval (using the individual 90-s dwells).

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